Crossed roller bearing with oil reservoir
By setting V-shaped annular grooves and oil storage channels in crossed roller bearings, the problems of insufficient lubrication continuity and low circulation efficiency are solved, achieving efficient circulation of lubricating oil and improving lubrication effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU CHICHUANG MACHINERY
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-31
AI Technical Summary
Existing crossed roller bearings suffer from insufficient lubrication continuity, inadequate traditional oil reservoir design, and low lubricating oil circulation efficiency, especially under heavy load conditions where the lubricating film is prone to rupture.
Design a cross roller bearing with built-in oil storage by setting V-shaped annular grooves on the outer and inner rings, with the roller body located between them and separated by a spacer block. The spacer block has an oil storage channel that is connected to the space, and a seal is set between the inner and outer rings to prevent leakage, thereby increasing the circulation and distribution efficiency of lubricating oil.
It achieves efficient circulation and direct lubrication of lubricating oil, avoids lubricating oil leakage, and improves the lubrication effect and reliability of bearings, especially under heavy load conditions.
Smart Images
Figure CN224579644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crossed roller bearing technology, and in particular to a crossed roller bearing with built-in oil reservoir. Background Technology
[0002] Crossed roller bearings, with their unique orthogonal roller arrangement (rollers are distributed at 90° intervals), can simultaneously withstand combined radial, axial, and overturning moment loads, and are widely used in high-precision, high-reliability fields such as industrial robots, CNC machine tools, wind turbines, and aerospace. In recent years, with the rapid development of intelligent manufacturing and new energy industries, the operating environment of bearings has become increasingly harsh.
[0003] Existing crossed roller bearings have the following problems: insufficient lubrication continuity, inadequate oil reservoir design in traditional grease lubrication, low oil reservoir depth and single oil guide channel, which cannot achieve efficient circulation of lubricating oil, leading to rupture of the lubricating film under heavy load conditions. Therefore, we propose a crossed roller bearing with built-in oil reservoir to solve the above problems. Utility Model Content
[0004] This invention provides a cross roller bearing with built-in oil storage, which solves the technical problems of insufficient lubrication, single oil guide channel, and low circulation of lubricating oil in current cross roller bearings.
[0005] To solve the above-mentioned technical problems, this utility model provides a cross roller bearing with built-in oil storage, including an inner ring, an outer ring, and a plurality of roller bodies. The outer ring has a first V-shaped annular groove on the side near the inner ring, and the inner ring has a second V-shaped annular groove on the side near the outer ring. The plurality of roller bodies are disposed in the space formed by the first V-shaped annular groove and the second V-shaped annular groove. An isolation block is provided between two adjacent roller bodies. The isolation block has a plurality of oil storage channels, and the openings of the plurality of oil storage channels are all connected to the space. At least one of the oil storage channels has openings at both ends leading to two adjacent roller bodies on both sides of the isolation block. Sealing elements are provided on the upper and lower sides between the inner ring and the outer ring.
[0006] Preferably, the axes of two adjacent roller bodies are perpendicular to each other, and the two sides of the isolation block are provided with arc-shaped grooves that are adapted to the two adjacent roller bodies.
[0007] Preferably, at least one of the upper and lower sides between the inner and outer rings has an oil filling hole, and the oil filling hole is connected to the space formed by the first V-shaped annular groove and the second V-shaped annular groove.
[0008] Preferably, oil filling holes are provided on both the upper and lower sides between the inner and outer rings.
[0009] Preferably, a sealing element is embedded in the filler hole to seal the filler hole.
[0010] Preferably, both the bottom of the first V-shaped annular groove and the second V-shaped annular groove are provided with oil storage tanks.
[0011] Preferably, the oil storage channel also includes a first channel that runs horizontally through the isolation block and a second channel that runs vertically through the isolation block.
[0012] Preferably, the first channel and the second channel are cross-connected.
[0013] Preferably, a first through hole is provided in the first channel, and a second through hole is provided in the arc-shaped groove of the isolation block, with the first through hole and the second through hole communicating with each other.
[0014] Compared with related technologies, this utility model has the following beneficial effects: 1. Compared with traditional crossed roller bearings, this utility model has a first V-shaped annular groove on the outer ring near the inner ring and a second V-shaped annular groove on the inner ring near the outer ring. Several roller bodies are arranged in the space formed by the first and second V-shaped annular grooves. An isolation block is provided between two adjacent roller bodies. The isolation block has several oil storage channels, and the openings of the oil storage channels are all connected to the space. At least one oil storage channel has openings at both ends that lead to two adjacent roller bodies on both sides of the isolation block, which can more directly and effectively lubricate the roller bodies. Sealing elements are provided on the upper and lower sides between the inner and outer rings to prevent the lubricating oil in the bearing from leaking. Therefore, this application solves the technical problems of traditional single oil storage channels, poor lubricating oil circulation, and poor bearing lubrication effect. Attached Figure Description
[0015] Figure 1 A cross-sectional view of a cross roller bearing with built-in oil reservoir; Figure 2 This is an enlarged view of point A in a cross roller bearing with its own oil reservoir; Figure 3 This is a spatial structure diagram of the first V-shaped annular groove and the second V-shaped annular groove in a cross roller bearing with built-in oil storage. Figure 4 This is a schematic diagram of the structure of a spacer block in a cross roller bearing with its own oil reservoir; Figure 5 This is a cross-sectional schematic diagram of the isolation block in a cross roller bearing with its own oil reservoir; Figure 6 This is a schematic diagram of the structure of an oil reservoir in a cross roller bearing with built-in oil storage; Figure 7 This is a schematic diagram of the reinforcing member structure in a cross roller bearing with its own oil reservoir.
[0016] The following are the labeling elements in the diagram: 1. Outer ring; 11. First V-shaped annular groove; 2. Inner ring; 21. Second V-shaped annular groove; 3. Space; 4. Roller body; 5. Oil filling through hole; 6. Seal; 7. Oil storage channel; 71. First channel; 72. Second channel; 73. First through hole; 74. Second through hole; 8. Isolation block; 81. Arc groove; 9. Oil storage tank; 10. Reinforcing member. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0018] Example 1 like Figures 1-6 As shown, a cross roller bearing with built-in oil storage includes an inner ring 2, an outer ring 1, and a plurality of roller bodies 4. The outer ring 1 has a first V-shaped annular groove 11 on the side near the inner ring 2, and the inner ring 2 has a second V-shaped annular groove 21 on the side near the outer ring 1. The plurality of roller bodies 4 are disposed in the space 3 formed by the first V-shaped annular groove 11 and the second V-shaped annular groove 21. An isolation block 8 is disposed between two adjacent roller bodies 4. The isolation block 8 is provided with a plurality of oil storage channels 7. The openings of the plurality of oil storage channels 7 are all connected to the space 3. At least one oil storage channel 7 has openings at both ends that lead to two adjacent roller bodies 4 on both sides of the isolation block 8. Sealing elements 6 are provided on the upper and lower sides between the inner ring 2 and the outer ring 1. A first V-shaped annular groove 11 is provided on the side of the outer ring 1 near the inner ring 2, and a second V-shaped annular groove 21 is provided on the side of the inner ring 2 near the outer ring 1. Several roller bodies 4 are arranged in the space 3 formed by the first V-shaped annular groove 11 and the second V-shaped annular groove 21. An isolation block 8 is provided between two adjacent roller bodies 4. Several oil storage channels 7 are provided in the isolation block 8. The openings of several oil storage channels 7 are all connected to the space 3. At least one oil storage channel 7 has openings at both ends that lead to two adjacent roller bodies 4 on both sides of the isolation block 8. The lubricating oil can lubricate the roller bodies 4 more directly and effectively. Sealing elements 6 are provided on the upper and lower sides between the inner ring 2 and the outer ring 1. The sealing elements 6 can be made of rubber to prevent the lubricating oil in the bearing from leaking. Therefore, this application solves the technical problems of the traditional single oil storage channel 7, poor circulation effect of lubricating oil, and poor bearing lubrication effect.
[0019] Example 2 like Figure 4As shown, the axes of two adjacent roller bodies 4 are perpendicular to each other. The two sides of the isolation block 8 are provided with arc-shaped grooves 81 that are adapted to the two adjacent roller bodies 4. The arc-shaped grooves 81 can better fit the rotation of the roller bodies 4, so that the bearing runs smoothly. like Figures 2-3 As shown, at least one of the upper and lower sides between the inner ring 2 and the outer ring 1 has an oiling hole 5. The oiling hole 5 is connected to the space 3 formed by the first V-shaped annular groove 11 and the second V-shaped annular groove, so that the lubricating oil can flow fully into the space 3 where the roller body 4 is located, and fully lubricate the surface of the roller body 4. like Figures 2-3 As shown, there are oil filling holes 5 on both the upper and lower sides between the inner ring 2 and the outer ring 1. When the lubricating oil in the bearing is consumed, lubricating oil can be injected into the bearing through the oil filling holes 5. like Figures 1-3 As shown, a sealing element 6 is embedded in the oil filling hole 5 to seal the oil filling hole 5. The sealing element 6 prevents the lubricating oil in the bearing from leaking outward. like Figure 1 , Figure 6 As shown, both the bottom of the first V-shaped annular groove 11 and the second V-shaped annular groove 21 are provided with oil storage grooves 9 to store more lubricating oil and provide sufficient lubrication for the internal structure of the bearing. like Figure 5 As shown, the oil storage channel 7 also includes a first channel 71 that runs horizontally through the isolation block 8 and a second channel 72 that runs vertically through the isolation block 8, which increases the flow direction of lubricating oil inside the isolation block 8 and provides sufficient lubrication to the internal structure of the bearing. like Figure 5 As shown, the first channel 71 and the second channel 72 are interconnected, which increases the efficiency of lubricating oil flow within the isolation block 8; like Figure 5 As shown, a first through hole 73 is provided in the first channel 71, and a second through hole 74 is provided in the arc groove 81 of the isolation block 8. The first through hole 73 and the second through hole 74 are connected, which avoids the single nature of the oil storage channel 7 and further increases the flow direction of lubricating oil inside the bearing, so as to realize the efficient circulation lubrication of lubricating oil inside the bearing.
[0020] Example 2 like Figure 7As shown in Embodiment 1 or Embodiment 2, the presence of several oil storage channels 7 within the isolation block 8 reduces the structural strength of the isolation block 8. To further enhance the structural strength of the isolation block 8, reinforcing members 10 are provided in both the first channel 71 and the second channel 72. The reinforcing member 10 can be a straight support structure, a triangular structure, or a rectangular structure. In this embodiment, a triangular structure is provided to enhance the overall strength of the isolation block 8 and avoid the problem of reduced structural strength caused by too many oil storage channels 7.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A cross-roller bearing with integrated oil reservoir, comprising an inner ring (2), an outer ring (1) and a plurality of roller bodies (4), characterized in that The outer ring (1) has a first V-shaped annular groove (11) on the side near the inner ring (2), and the inner ring (2) has a second V-shaped annular groove (21) on the side near the outer ring (1). A plurality of roller bodies (4) are arranged in the space (3) formed by the first V-shaped annular groove (11) and the second V-shaped annular groove (21). An isolation block (8) is provided between two adjacent roller bodies (4). A plurality of oil storage channels (7) are provided in the isolation block (8). The openings of the plurality of oil storage channels (7) are all connected to the space (3). At least one of the oil storage channels (7) has openings at both ends that lead to two adjacent roller bodies (4) on both sides of the isolation block (8). Sealing elements (6) are provided on the upper and lower sides between the inner ring (2) and the outer ring (1).
2. A cross-roller bearing with integral reservoir according to claim 1, wherein, The axes of two adjacent roller bodies (4) are perpendicular to each other, and the two sides of the isolation block (8) are provided with arc-shaped grooves (81) that are adapted to the two adjacent roller bodies (4).
3. The cross-roller bearing with integral reservoir of claim 1, wherein, At least one of the upper and lower sides between the inner ring (2) and the outer ring (1) is provided with a filling hole (5), and the filling hole (5) is connected to the space (3) formed by the first V-shaped annular groove (11) and the second V-shaped annular groove.
4. A cross-roller bearing with integral reservoir according to claim 3, wherein, The inner ring (2) and the outer ring (1) are provided with oil filling holes (5) on both the upper and lower sides.
5. A cross-roller bearing with integral oil reservoir according to claim 3 or 4, wherein, A sealing element (6) is embedded in the oil filling hole (5) to seal the oil filling hole (5).
6. The cross-roller bearing with integral reservoir of claim 1, wherein, Both the first V-shaped annular groove (11) and the second V-shaped annular groove (21) have oil storage tanks (9) at their bottoms.
7. A cross roller bearing with built-in oil reservoir according to claim 1, characterized in that, The oil storage channel (7) also includes a first channel (71) that runs horizontally through the isolation block (8) and a second channel (72) that runs vertically through the isolation block (8).
8. A cross-roller bearing with integral reservoir according to claim 7, wherein, The first channel (71) and the second channel (72) are cross-connected.
9. A cross-roller bearing with integral reservoir according to claim 7, wherein, The first channel (71) has a first through hole (73), and the arc groove (81) of the isolation block (8) has a second through hole (74), and the first through hole (73) and the second through hole (74) are connected.